CA2571676C - A method and a device for facilitating the removal of pin bones in fish - Google Patents
A method and a device for facilitating the removal of pin bones in fish Download PDFInfo
- Publication number
- CA2571676C CA2571676C CA2571676A CA2571676A CA2571676C CA 2571676 C CA2571676 C CA 2571676C CA 2571676 A CA2571676 A CA 2571676A CA 2571676 A CA2571676 A CA 2571676A CA 2571676 C CA2571676 C CA 2571676C
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- CA
- Canada
- Prior art keywords
- filet
- pin
- pin bones
- fish flesh
- fish
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
- A22C—PROCESSING MEAT, POULTRY, OR FISH
- A22C25/00—Processing fish ; Curing of fish; Stunning of fish by electric current; Investigating fish by optical means
- A22C25/16—Removing fish-bones; Filleting fish
- A22C25/166—Removing loose pin bones, e.g. from fish fillets
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Food Science & Technology (AREA)
- Processing Of Meat And Fish (AREA)
Abstract
A method and a device for facilitating the removal of a pin bone (2) from fish flesh, wherein the pin bone (2) is cut within a filet part of the fish flesh.
Description
A METHOD AND A DEVICE FOR FACILITATING THE REMOVAL OF PIN
BONES IN FISH
This invention concerns a method for facilitating the removal of pin bones in fish. More particularly, it relates to a method in which the pin bone is cut closest to its outwardly projecting portion, and in which the relatively hard bone portion of the pin bone then may be removed from the fish flesh, whereas the softer cartilage portion of the pin bone may remain in the fish. The invention also comprises a device n for carrying out the method.
As known, a vertically and upwardly-directed bone projects out from the dorsal vertebra of a fish, and with respect to the foremost dorsal vertebras, also at least two rib bones encircle the abdominal cavity. In several species of fish, is including species of salmon, the foremost dorsal vertebras are also provided with two so-called dorsal ribs projecting substantially horizontally outward in either direction from the dorsal vertebra. Oftentimes the dorsal ribs are described as pin bones.
BONES IN FISH
This invention concerns a method for facilitating the removal of pin bones in fish. More particularly, it relates to a method in which the pin bone is cut closest to its outwardly projecting portion, and in which the relatively hard bone portion of the pin bone then may be removed from the fish flesh, whereas the softer cartilage portion of the pin bone may remain in the fish. The invention also comprises a device n for carrying out the method.
As known, a vertically and upwardly-directed bone projects out from the dorsal vertebra of a fish, and with respect to the foremost dorsal vertebras, also at least two rib bones encircle the abdominal cavity. In several species of fish, is including species of salmon, the foremost dorsal vertebras are also provided with two so-called dorsal ribs projecting substantially horizontally outward in either direction from the dorsal vertebra. Oftentimes the dorsal ribs are described as pin bones.
The pin bone comprises a relatively hard bone portion closest to the dorsal vertebra and a softer cartilaginous portion comprising collagenic fibres closest to its outer end portion. The outer end portion is provided with a relatively large number of threadlike, soft tendons extending from the cartilage portion and out into the fish flesh. These tendons connect the pin bone with the fish flesh in an efficient manner.
When the pin bone is to be removed from the fish flesh during cleaning of fresh fish, said relatively strong connection between the pin bone and the fish flesh causes the pin bone to be torn off in a position along the length thereof, or that some fish flesh is entrained with the pin bone out of the fish. If fish flesh is entrained with the pin bone, this results in lost profits from the fish flesh, opening in the filet and damage within the fish flesh. -To remedy this problem, it is common in the art to cut the fish flesh in a V-shape along the pin bones in order to remove them, or to wait until rigor mortis has abandoned the flesh and then remove them.
To achieve efficient cleaning and fish production, it is desirable to be able to remove the pin bones during the same cleaning process that comprises removal of the other bones of the fish. As such, it is both cumbersome and cost driving to have to store the fish intermediately and then remove the pin bones. It is also undesirable to have to cut the fish flesh along the pin bones in order to remove them, insofar as this causes the fish flesh to be damaged.
Locating the pin bones and the very removal operation may be carried out by means of methods and devices familiar to person skilled in the art and is therefore not described in further detail.
The object of the invention is to remedy or reduce at least one of the disadvantages of prior art.
The object is achieved in accordance with the invention and by means of the features disclosed in the following description and in the subsequent claims.
In accordance with another aspect of the present invention, there is also provided a method for facilitating the removal of pin bones from a filet portion of fish flesh, the pin bones extending in a row within the filet portion, the method comprising inserting a knife into the filet portion of the fish flesh and cutting the pin bones by displacing the knife in an insertion direction along the row of pin bones.
In accordance with yet another aspect of the present invention, there is also provided a device for facilitating the removal of pin bones from a filet portion of fish flesh, the pin bones extending in a row within the filet portion, the device comprising a knife having a cutting edge disposed at an end portion of the knife, the knife being configured for displacement into the fish flesh, end portion first, in a direction along the row of pin bones thereby cutting the pin bones within the filet portion of the fish flesh.
In accordance with yet another aspect of the present invention, there is also provided a method of facilitating removal of a plurality of pin bones extending in a row and transversely outwardly from an elongated dorsal vertebra in 3a a filet portion of fish flesh, each pin bone having a hard bone portion and a softer cartilaginous portion that are disposed inside the filet portion, the method comprising the steps of: inserting a knife into the filet portion in a direction transverse to the plurality of pin bones extending in a row and against the pin bones to cut all of the hard bone portions from the softer cartilaginous portions at a location inside of the filet portion in a single motion;
pulling the hard bone portions out of the inside of the filet portion, away from the softer cartilaginous portions.
In accordance with yet another aspect of the present invention, there is also provided a device designed for facilitating the removal of pin bones from a filet portion of fish flesh, the pin bones extending in a row within the filet portion, and arranged for carrying out the method according to claim 1, wherein the device is arranged to be loaded with said filet portion and comprises: a knife having an elongated body with an end portion at a tip of the elongated body, the end portion having a sharp edge such that displacement of the knife in a longitudinal direction along the row of pin bones causes the sharp edge to be displaced substantially perpendicularly against and past the pin bones, wherein, when the knife is inserted into the fish flesh of said filet portion, the sharp edge of the end portion of the knife cuts all of said pin bones of said row within the filet portion into a hard bone portion and a softer cartilaginous portion at a predetermined position along the pin bones' length.
3b In order to enable the removal of the relatively hard bone portion of the pin bone from fresh fish flesh, the pin bone is cut inside the filet part of the fish flesh, typically in a position closer to the end portion of the pin bone projecting outwardly into the fish flesh than that of the opposite end portion of the pin bone, prior to removing the pin bone.
At least a part of the relatively soft end portion, which comprises tendons, thus remains in the fish flesh after otherwise having removed the pin bone. These remaining portions, however, are sufficiently soft to normally not be perceived as bones when eaten.
The pin bones may be cut while present in the fish flesh, for example by means of displacing a knife within the fish flesh. Advantageously, the knife is displaced from the head end of a fish filet and in the direction along the row of pin bones, thereby rendering possible to cut all pin bones on one side in the same cutting operation.
When the pin bone is to be removed from the fish flesh during cleaning of fresh fish, said relatively strong connection between the pin bone and the fish flesh causes the pin bone to be torn off in a position along the length thereof, or that some fish flesh is entrained with the pin bone out of the fish. If fish flesh is entrained with the pin bone, this results in lost profits from the fish flesh, opening in the filet and damage within the fish flesh. -To remedy this problem, it is common in the art to cut the fish flesh in a V-shape along the pin bones in order to remove them, or to wait until rigor mortis has abandoned the flesh and then remove them.
To achieve efficient cleaning and fish production, it is desirable to be able to remove the pin bones during the same cleaning process that comprises removal of the other bones of the fish. As such, it is both cumbersome and cost driving to have to store the fish intermediately and then remove the pin bones. It is also undesirable to have to cut the fish flesh along the pin bones in order to remove them, insofar as this causes the fish flesh to be damaged.
Locating the pin bones and the very removal operation may be carried out by means of methods and devices familiar to person skilled in the art and is therefore not described in further detail.
The object of the invention is to remedy or reduce at least one of the disadvantages of prior art.
The object is achieved in accordance with the invention and by means of the features disclosed in the following description and in the subsequent claims.
In accordance with another aspect of the present invention, there is also provided a method for facilitating the removal of pin bones from a filet portion of fish flesh, the pin bones extending in a row within the filet portion, the method comprising inserting a knife into the filet portion of the fish flesh and cutting the pin bones by displacing the knife in an insertion direction along the row of pin bones.
In accordance with yet another aspect of the present invention, there is also provided a device for facilitating the removal of pin bones from a filet portion of fish flesh, the pin bones extending in a row within the filet portion, the device comprising a knife having a cutting edge disposed at an end portion of the knife, the knife being configured for displacement into the fish flesh, end portion first, in a direction along the row of pin bones thereby cutting the pin bones within the filet portion of the fish flesh.
In accordance with yet another aspect of the present invention, there is also provided a method of facilitating removal of a plurality of pin bones extending in a row and transversely outwardly from an elongated dorsal vertebra in 3a a filet portion of fish flesh, each pin bone having a hard bone portion and a softer cartilaginous portion that are disposed inside the filet portion, the method comprising the steps of: inserting a knife into the filet portion in a direction transverse to the plurality of pin bones extending in a row and against the pin bones to cut all of the hard bone portions from the softer cartilaginous portions at a location inside of the filet portion in a single motion;
pulling the hard bone portions out of the inside of the filet portion, away from the softer cartilaginous portions.
In accordance with yet another aspect of the present invention, there is also provided a device designed for facilitating the removal of pin bones from a filet portion of fish flesh, the pin bones extending in a row within the filet portion, and arranged for carrying out the method according to claim 1, wherein the device is arranged to be loaded with said filet portion and comprises: a knife having an elongated body with an end portion at a tip of the elongated body, the end portion having a sharp edge such that displacement of the knife in a longitudinal direction along the row of pin bones causes the sharp edge to be displaced substantially perpendicularly against and past the pin bones, wherein, when the knife is inserted into the fish flesh of said filet portion, the sharp edge of the end portion of the knife cuts all of said pin bones of said row within the filet portion into a hard bone portion and a softer cartilaginous portion at a predetermined position along the pin bones' length.
3b In order to enable the removal of the relatively hard bone portion of the pin bone from fresh fish flesh, the pin bone is cut inside the filet part of the fish flesh, typically in a position closer to the end portion of the pin bone projecting outwardly into the fish flesh than that of the opposite end portion of the pin bone, prior to removing the pin bone.
At least a part of the relatively soft end portion, which comprises tendons, thus remains in the fish flesh after otherwise having removed the pin bone. These remaining portions, however, are sufficiently soft to normally not be perceived as bones when eaten.
The pin bones may be cut while present in the fish flesh, for example by means of displacing a knife within the fish flesh. Advantageously, the knife is displaced from the head end of a fish filet and in the direction along the row of pin bones, thereby rendering possible to cut all pin bones on one side in the same cutting operation.
Such a cutting operation may be carried out manually by means of a handheld knife, in which the knife comprises a relatively lengthy knife blade having a sharp edge in the end portion facing the fish. When this sharp end portion is displaced substantially perpendicularly against and past the pin bones, the pin bones are cut in predetermined position along their length.
Obviously, this operation may be automated, for example by providing a prior art head cutting machine, cleaning machine lo or filleting machine with the necessary equipment.
Hereinafter, a non-limiting example of a preferred method and embodiment is described, which is illustrated on the accompanying drawings, in which:
Figure 1 shows a fish filet in perspective and schematically, in which the pin bones are indicated in dash lines, and in which a knife is located in a position being prepared for insertion into the fish flesh; and Figure 2 shows the same as in figure 1, but here the knife is displaced some distance into the fish flesh.
On the drawings the reference numeral 1 denotes a fish filet comprising a number of pin bones 2. The pin bones 2 have been cut from their respective dorsal vertebras (not shown) and project from an upward-facing surface 4 of the fish filet 1 and into the fish filet 1.
When the fish filet 1 is in this position, the pin bones 2 may be gripped and pulled out by means of equipment known per se (not shown).
Prior to carrying out the removal, a knife 6, which is provided with an edge 8 at an end portion thereof facing the fish filet 1, is displaced into the fish filet 1 and along 5 the row of pin bones 2, cf. figure 2, thereby cutting the pin bones 2.
Upon being removed, the knife 6 leaves behind a cut 10 in the fish filet 1. The knife 6, however, is formed with a relatively narrow cross section, and the cut 10 thus does not lo significantly diminish the quality of the fish filet 1.
In the example of an embodiment shown, the edge 8 is V-shaped to better seek out the pin bones 2 during the displacement of the knife 6 in the fish filet 1.
Obviously, this operation may be automated, for example by providing a prior art head cutting machine, cleaning machine lo or filleting machine with the necessary equipment.
Hereinafter, a non-limiting example of a preferred method and embodiment is described, which is illustrated on the accompanying drawings, in which:
Figure 1 shows a fish filet in perspective and schematically, in which the pin bones are indicated in dash lines, and in which a knife is located in a position being prepared for insertion into the fish flesh; and Figure 2 shows the same as in figure 1, but here the knife is displaced some distance into the fish flesh.
On the drawings the reference numeral 1 denotes a fish filet comprising a number of pin bones 2. The pin bones 2 have been cut from their respective dorsal vertebras (not shown) and project from an upward-facing surface 4 of the fish filet 1 and into the fish filet 1.
When the fish filet 1 is in this position, the pin bones 2 may be gripped and pulled out by means of equipment known per se (not shown).
Prior to carrying out the removal, a knife 6, which is provided with an edge 8 at an end portion thereof facing the fish filet 1, is displaced into the fish filet 1 and along 5 the row of pin bones 2, cf. figure 2, thereby cutting the pin bones 2.
Upon being removed, the knife 6 leaves behind a cut 10 in the fish filet 1. The knife 6, however, is formed with a relatively narrow cross section, and the cut 10 thus does not lo significantly diminish the quality of the fish filet 1.
In the example of an embodiment shown, the edge 8 is V-shaped to better seek out the pin bones 2 during the displacement of the knife 6 in the fish filet 1.
Claims (12)
1. A method for facilitating the removal of pin bones from a filet portion of fish flesh, the pin bones extending in a row within the filet portion, the method comprising inserting a knife into the filet portion of the fish flesh and cutting the pin bones by displacing the knife in an insertion direction along the row of pin bones.
2. The method according to claim 1, further comprising, following the step of cutting the pin bones, removing the pin bones from the fish flesh.
3. The method according to claim 1, wherein each said pin bone has a hard bone portion and a softer cartilaginous portion that are disposed inside the filet portion, the method further comprising cutting the hard bone portions from the softer cartilaginous portions in a single motion, and pulling the hard bone portions from within the filet portion, away from the softer cartilaginous portions.
4. The method according to claim 3, wherein the softer cartilaginous portions are attached to tendons, further comprising maintaining the tendons inside the fish flesh after removal of the hard bone portions.
5. The method according to claim 1, wherein the hard bone portions have a first end portion projecting into the fish flesh and a second end portion extending out of the fish flesh, further comprising cutting each of the pin bones at a location closer to the first end portion than the second end portion.
6. The method according to claim 1, further comprising removing the knife from the filet portion in a direction opposite to the insertion direction.
7 7. A method of facilitating removal of a plurality of pin bones extending in a row and transversely outwardly from an elongated dorsal vertebra in a filet portion of fish flesh, each pin bone having a hard bone portion and a softer cartilaginous portion that are disposed inside the filet portion, the method comprising the steps of: inserting a knife into the filet portion in a direction transverse to the plurality of pin bones extending in a row and against the pin bones to cut all of the hard bone portions from the softer cartilaginous portions at a location inside of the filet portion in a single motion; pulling the hard bone portions out of the inside of the filet portion, away from the softer cartilaginous portions.
8. The method according to claim 7, wherein the softer cartilaginous portions are attached to tendons that remain inside the fish flesh after removal of the hard bone portions.
9. The method according to claim 7, wherein the hard bone portions have a first end portion projecting into the fish flesh and a second end portion extending out of the fish flesh, wherein each pin bone is cut at a location closer to the first end portion than the second end portion.
10. The method according to claim 7, wherein the knife is configured to be hand-held.
11. The method according to claim 7, further comprising the step of removing the knife from the filet portion in a direction opposite of the direction of insertion.
12. The method according to claim 7, wherein said knife has a cutting end that is V-shaped.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20042875 | 2004-07-07 | ||
| NO20042875A NO319441B1 (en) | 2004-07-07 | 2004-07-07 | Method and apparatus for facilitating fish bone extraction |
| PCT/NO2005/000237 WO2006004420A1 (en) | 2004-07-07 | 2005-06-29 | A method and a device for facilitating the removal of pin bones in fish |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2571676A1 CA2571676A1 (en) | 2006-01-12 |
| CA2571676C true CA2571676C (en) | 2015-02-03 |
Family
ID=35013281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2571676A Active CA2571676C (en) | 2004-07-07 | 2005-06-29 | A method and a device for facilitating the removal of pin bones in fish |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US7850511B2 (en) |
| CN (1) | CN1997281A (en) |
| CA (1) | CA2571676C (en) |
| DE (1) | DE112005001659B4 (en) |
| DK (1) | DK176374B1 (en) |
| IS (1) | IS2911B (en) |
| NO (1) | NO319441B1 (en) |
| WO (1) | WO2006004420A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8719420B2 (en) * | 2008-05-13 | 2014-05-06 | At&T Mobility Ii Llc | Administration of access lists for femtocell service |
| NO328972B1 (en) | 2008-09-26 | 2010-07-05 | Trio Food Proc Machinery As | Method and apparatus for extracting the bones from a fillet |
| FI127035B (en) * | 2013-11-12 | 2017-10-13 | Arctic Ip Invest Ab | The method performs a dry salting process of fish |
| JP7330788B2 (en) * | 2019-07-17 | 2023-08-22 | 宏幸 明神 | Kabayaki production method |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3570048A (en) * | 1969-08-05 | 1971-03-16 | Nordischer Maschinenbau | Apparatus for producing fish fillets free from pinbones |
| US4151629A (en) * | 1972-01-08 | 1979-05-01 | Nordischer Maschinenbau Rud. Baader | Method and device for gaining fish meat |
| DE2316791C2 (en) * | 1973-04-04 | 1975-02-13 | Nordischer Maschinenbau, Rud. Baader, 2400 Luebeck | Method and device for filleting fish |
| DE2317622C2 (en) * | 1973-04-07 | 1975-05-28 | Nordischer Maschinenbau, Rud. Baader, 2400 Luebeck | Process for filleting fish |
| GB1513243A (en) * | 1974-05-14 | 1978-06-07 | Unilever Ltd | Method and apparatus for filleting fish |
| GB1461296A (en) * | 1974-06-12 | 1977-01-13 | Findus | Fish boning tools |
| US4056866A (en) * | 1976-04-08 | 1977-11-08 | Nordischer Maschinenbau Rud. Baader | Fish processing machines |
| US4771511A (en) * | 1987-07-13 | 1988-09-20 | Weyand Patrick J | Tool and method for deboning fish |
| EP0341335B1 (en) * | 1988-05-13 | 1991-11-27 | Frisco-Findus Ag | Apparatus for the removal of fish bones |
| US4920612A (en) * | 1989-06-05 | 1990-05-01 | Moore George A | Fish fillet knife |
| US5911621A (en) * | 1996-07-25 | 1999-06-15 | Durst; Paul William | Apparatus for deboning fish fillets |
| US5830052A (en) * | 1996-09-03 | 1998-11-03 | Wadsworth; Ray G. | Total bone removal system |
| US6123614A (en) * | 1998-02-20 | 2000-09-26 | University Of Alaska Fairbanks | Method and apparatus for removing pin bones |
| US6406366B1 (en) * | 1998-02-20 | 2002-06-18 | University Of Alaska Fairbanks | Method and apparatus for removing pin bones |
| US5947808A (en) * | 1998-05-14 | 1999-09-07 | Clariant Gmbh | Seafood skin, membrane, bone, cartilage, antennae, leg, shell, beard and/or vein removal apparatus and methods for use thereof |
| CA2394501A1 (en) * | 1999-12-14 | 2001-06-21 | Carnitech A/S | Method and apparatus for bone removing |
| ES2246322T3 (en) | 2000-05-10 | 2006-02-16 | Kald Fisk As | IMPROVED PROCEDURE FOR PRODUCTION OF PRODUCTS BASED ON CRUDE FISH. |
| US6935941B1 (en) * | 2004-03-02 | 2005-08-30 | Thomas C. Muehlenbeck | Fish pin bone remover |
-
2004
- 2004-07-07 NO NO20042875A patent/NO319441B1/en not_active IP Right Cessation
-
2005
- 2005-06-29 CN CNA2005800230074A patent/CN1997281A/en active Pending
- 2005-06-29 DE DE112005001659.5T patent/DE112005001659B4/en not_active Expired - Fee Related
- 2005-06-29 WO PCT/NO2005/000237 patent/WO2006004420A1/en active Application Filing
- 2005-06-29 CA CA2571676A patent/CA2571676C/en active Active
- 2005-06-29 US US11/631,492 patent/US7850511B2/en active Active
-
2006
- 2006-12-20 DK DK200601676A patent/DK176374B1/en not_active IP Right Cessation
-
2007
- 2007-02-06 IS IS8603A patent/IS2911B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO20042875A (en) | 2005-08-15 |
| IS2911B (en) | 2014-11-15 |
| DK200601676A (en) | 2007-01-04 |
| US7850511B2 (en) | 2010-12-14 |
| CN1997281A (en) | 2007-07-11 |
| DK176374B1 (en) | 2007-10-15 |
| NO20042875D0 (en) | 2004-07-07 |
| US20080261502A1 (en) | 2008-10-23 |
| DE112005001659T5 (en) | 2007-07-12 |
| WO2006004420A1 (en) | 2006-01-12 |
| DE112005001659B4 (en) | 2017-03-09 |
| NO319441B1 (en) | 2005-08-15 |
| CA2571676A1 (en) | 2006-01-12 |
| IS8603A (en) | 2007-02-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |